/ Dictionary / Index T total impulse: Meaning and Definition of Find definitions for: to'tal im'pulse Pronunciation: [key] — Rocketry. Rocketry. a measure of the maximum momentum that a given reaction engine and fuel supply can impart to a vehicle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. total heat total internal reflection Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language